I am sure (it) will be fine tomorrow 中的It 为什么不能用there替换?请说明点

I'am sure it will be quiet useful是什么意思 I am sure that i will never I will be right here waiting for you!I am sure about it! OK .I am sure he will come I am sure the soup tastes well.You will enjoy it怎么改 P____ it will rain tomorrow ,but i am not sure填空 why not have a try?I am enjoy you it sure will 组成一句话 I am not sure whether it will be ____ ____(平局) this time. I am quiet sure of it,too. cheer up!i am sure you will make it为什么其中的make it不能换成do it I am sure (it) will be fine tomorrow 中的It 为什么不能用there替换?请说明点 I am sure that he will succeed . = I am sure _____ _____ ____. I will be right here waiting for you!I am sure about it!This is the second! I am sure I will make it ______ if our teacher givesme a second chance.填什么 为什么 I am sure I will win next time同义句 I will work hard and I am sure to overtake I am sure i will……的句子成分? I am sure I will() () well with my new classmates.